http://www.britannica.com/topic/incommensurable

My dear girl do you wish to  be married?

Don’t study maths, else you’ll be harried.

Men are afraid of us

Women can’t mate with us

So  one might as well  die and  be buried.

 

My reaction may seem  too  extreme

For surely  one may get some esteem;

For playing with irrationals,

viewing  incommensurables

is a metaphor for political themes.

 

For whole numbers are easy to see

And fractions  quite rational  be.

But the square on the diagonal

Is totally irrational

And from the circumference’s demands we  may flee.

 

And comparing the circle and square

Shows  unconmensurable  flair.

And human folk too

Exhibit this too.

So in marriage don’t expect all to be fair.

 

A straight line can be tangent to a curve

But never can two such  things merge.

But if the line keeps quite still

the curve  then might  well

Curve back  with delight in its  swerves.